Island Biogeography and Species Diversity

The video explores the theory of Island Biogeography, focusing on species richness, abundance, and the factors affecting species distribution. It discusses the impact of island size on species diversity, the dynamics of immigration and extinction, and human impact on species introduction. The concept of equilibrium between immigration and extinction is explained, along with a comparison of species diversity on small and large islands.

What is the general trend of species diversity as you move from the equator towards the poles?

• It fluctuates randomly.

• It remains constant.

• It decreases.

• It increases.

Which factor is NOT mentioned as affecting how species reach islands?

• Presence of predators

• Distance from the mainland

• Human intervention

• Island size

Which of the following is a method by which species can naturally reach islands?

• Floating on debris

• Flying

• Swimming

• All of the above

What happens to the emigration rate as island diversity increases?

• It increases.

• It decreases.

• It remains the same.

• It becomes unpredictable.

What is a key factor in determining the equilibrium point on an island?

• The amount of rainfall

• The number of predators

• The balance between immigration and extinction

• The presence of humans

What happens to extinction rates as island diversity increases?

• They become unpredictable.

• They remain constant.

• They increase.

• They decrease.

Why do smaller islands tend to have lower species diversity?

• They are closer to the mainland.

• They have more resources.

• They have fewer resources.

• They are more isolated.

What is the effect of a larger island size on species diversity?

• It decreases species diversity.

• It makes species diversity unpredictable.

• It increases species diversity.

• It has no effect on species diversity.

How does the distance from the mainland affect immigration rates to islands?

• Closer islands have lower immigration rates.

• Distance does not affect immigration rates.

• Farther islands have higher immigration rates.

• Closer islands have higher immigration rates.

Which island is likely to have more species, a near island or a far island?

• It depends on the island size

• Both have the same number of species

• A far island

• A near island